whose intersection of convergent regions is \(|m_{_3}^2/m_{_2}^2|\le 1\) .
These two linearly independent Gaussian functions compose of the fundamental
solution system of the GKZ-system of Eq.(REF ) in the region \(|m_{_3}^2/m_{_2}^2|\le 1\) 
which is consistent with the results in the literature. Choosing \(y_{_i}=0\)  in Eq.(46)
of Ref. [1]}, the fourth type Appell functions of the last two terms
are reduced into the two Gauss functions above.
